Where does it hurt?

P624

I went to some physical therapy a few months ago for a back injury; this was one of the exercises they gave me to do. Possible questions include:
Which one am I?
Do I need to use any protection? (I meant like a yoga mat or something)
Can I please keep my clothes on?
Does Tracy Morgan hate this stretch?
Is this stretch popular? In prison?
Can I just take an Advil?